Packing



PACKING Filed Nov. 29l 1924 mw 1V BY ygM/m/ W J M5 ATTORNEYS.

Patented Oct.: 13, i925.

UNITED STATES l l 1,556,623 PATENT OFFICE.

WILLIAM A. MINOR, or nocHEsrEn, NEW Yoax, .assIeNoR lIo LUI'rwIELEn PUMP- ING ENGINE COMPANY, 0F ROCHESTER, NEW YORK, A CORPORATION OF `NEW- Yoan. l

24eme.

Application nled November 28, 1924. Serial No. 752,968.

To all'whom 'it may concem.'

BeA it known that I, WILLIAM A. MINOR, a citizenof the United States, and resident of Rochester, in the county of Monroe and State ofvNew York, have invented certain new and useful Improvements in Packing, of which the following is a specication.

The'present invention relates to packing and to a method of making the same. An object of the invention is to produce a more serviceable packing designed forl pump pistons and other structures where the packing is carried by amoving part or has a moving part co-operatingtherewith. A further object of the invention is .to provide a packing 4Which'can be stored in stock previously to being used without losing its shape.-

To these and other ends, the invention' consists of certain parts andv combinations of parts, all of which' will be' hereinafter described: the novel features 'being pointed out in the appended claims.

In the drawings:

The figure is a sectional 'view of a cugped leather for ump pistons constructe in accordance with this invention.

In carrying out the invention the leather' i is first treated to soften the fibers, and to soften and destroy any grease or ,tallow` which may be resent in the leather. This is accomplishe preferably;V by the immersion of the leather in hot water which has a temperature varying with different typesof leather but suliicient to perform the results set forth. Any other agent may be used for softening the leather and destroying the grease or tallow so lon as the a nt will perform'the functions wlthout ad ing any material that will fill the pores of the leather.

After the leather is softened and while in this condition, it is molded into the desired shape and baked or heated to a tem erature just under the burning point oft e particular leather used. This evaporates the water or liquid in the leather and causes the leather to take a permanent set, the fibers adjusting themselves to their new positions. If leather is heated with the grease and tallow therein, the fibers will merely stretch and do not take permanent set, so that after being remove-d from the mold, the leather will gradually resume its former shape.

After the molding process, the leather lis filled wlth av suitable hardening and strengthening wax, such for instance as chrome sole stuffing. This hardening and strengthening wax is first dissolved, preferably without the use of heat, in a suit-v able agent such, for instance, as carbon tetrachlor1de. The leather is then dipped or lmmersed in this solution and thev solution penetrates the pores of' the-packing carrying the wax therein without the use of heat. The solvent is then permitted to evaporate, leaving the leather filled or stuffed with the wax.

A packing produced according to this invention kwill maintain its shapefmaking it possible for jobbers or dealers to furnish Immediately rep-airs to pump o erators, a

perfectly result which has not .been poss1 le before,.

due tothe fact thatmolded packing when held in stock will after a timelose its shape.'

The illertends to act as a lubricant for the part over which the packing moves thereby increasing the eiiiciency of the packing.

pores of the packingv are closed whereby the packing is strengthened and water under pressure is' prevented from penetratlng and destroying the packing. A packing :made in accordance with this invention is hardened to such anv extent that it provides .an ,increased resistance to sand, which in Adeep well pumps has heretofore rapidly de lstroyed the packing.'

1 What `I claim as my invention and desire' tosecureby vL etters Patent is:

v1. A leather packing in molded form havin the tallow and grease removed and Vstue with. a'hardening and strengthening Wax. v

2. The processl of treating leather packings 'which `consists in removing the tallow or grease from the -`leather, molding the leather into the desired shape under the action of heat, and filling the pores of the molded packing with a wax containing solution having a volatile solvent which will not destroy the molded shape. f

. 3. The process of treating molded leather packings which consists in immersing the molded 'packing in a cool solution containing wax and a volatile solvent, tocause the wax to be carried into the the wax in the pores of the packing.

ores without 4 heat and the solvent to volati ize and leave( 4. The process of making leather packand grease from the leather with an agent 10 ing which consists in removing the tallow which will soften the leather, molding the and grease from the leather with an agent packing While in a soft state, and heating which will soften the leather, molding the it While it is in the mold to cause the fibers packing While in a soft state, and heating of the leather to take a permanent setv and it While it is in the mold to cause the fibers thereafter filling the packing with a Wax 15 of the leather to take a permanent'set. Without destroying the molded shape of the 5. The process of making leather pack-A packing. ing Which consists in removing the tallow i WILLIAM A. MINOR. 

